Compressor tank drains

[lkg907]

I'm just now fixiing to install my compressor and 2 tanks in the crawlspace. I've got a switched 220 outlet in the crawlspace that is switched from the shop.
The tanks will be about 4ft below the shop. I've got both of the tank drains teed together.
I figure on running the drain out in the shop and using a ball valve on the dump. Some folks tell me that I won't be able to force the water uphill for 4 ft with 125 psi. I really don't see a problem.
Your comments?
Thanks

 

[hetkind]

let run the math...33' of water equals one atmospehere = 14.7 psi

so 33'/14.7 will equal 4'/x psi or 33x = 14.7x4 or x = 14.7x4/33 = 1.78 psi

so you can push the water 4' with under 2 psi

not a problem...

or at 125 psi you can go 1.78*125/2 = 111.1 feet

is that clear enough?

Howard

 

[metal1313]

yea with out math i could tell you that you've def got enought pressure for 4ft of rise. it should shoot the water pretty easy

 

[Torque1st]

Just use a 1/4" dia soft copper tube or nylon plastic for the drain line to a valve up top. That avoids any large amount of water remaining in the drain line when you blast it out. Run the line beyond the valve outside.

 

[kbs2244]

One valve per tank before the tee?
Either way you cna blow a lot of water a ong way with 120 PSI.
Just run the air untill is comes out dry.